01379naa a2200241 a 450000100080000000500110000800800410001910000130006024501430007326000090021652006790022565000250090465000160092965000160094565000170096165000100097865000100098865000130099865300160101165300090102770000180103677300830105414764712018-07-21       1983    bl uuuu     u00u1 u    #d1 aCRUZ, I.  aYield impact of larval infestation of the fall armyworm (LepidopterabNoctuidae) to Mid Whorl growth stage of corn.h[electronic resource]  c1983  aEgg masses of fall armyworm, Spodoptera frugiperda (J. E. Smith), were artificially placed on corn at the midwhorl growth stage. Levels of infestation tested included egg masses on 5, 10, 15, 20, and 100% of the plants. Population were assessed by leaf damage ratins. Yield parameters of grain weight, ear lenght, kernel number, ear damage, number ofdamaged kernels, and weight of 100 kernels were measured. Significant yield losses of 17% were sustained when 20 or 100% of the plants received egg masses. The relationships of leaf damage ratings and yield was liner and inverse. Yield losses were directly related to reduction in kernel number on ears from infested plants.  adevelopmental stages  aLepidoptera  aCrescimento  aInfestação  aMilho  aPraga  aZea Mays  aInfestation  aPest1 aTURPIN, F. T.  tJournal of Economic Entomology, College Parkgv. 76, n. 5, p. 1052-1054, 1983.